Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc5e18c67fae4a5…

MALICIOUS

PDF

39.5 KB Created: 2020-08-08 14:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8485e2c3a839aa3f5f55496460b498c0 SHA-1: 073d32a98956f1a13cbe5a959fafa4ea409508ff SHA-256: adc5e18c67fae4a50e91afdb68b5ba5201bdb76e99cb5d4198fb388fc3d42156
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=pdf+file+reducer+download+free'. This URL is part of a link farm designed to attract users searching for free PDF tools. The document body also contains this URL, reinforcing the lure. The presence of numerous embedded URLs, many hosted on cdn.shopify.com, suggests a broad distribution effort. No scripts were extracted from this sample.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=pdf+file+reducer+download+free
    • http://files.sersproducts.com/uploads/1/3/2/3/132302759/sozudamawo.pdf
    • http://pupudoxep.reimaginepossibilities.com/uploads/1/3/0/7/130775934/9798518.pdf
    • http://files.econatura.com/uploads/1/3/2/6/132681342/tabebisovixij_renuposeranibe_balekazoxuzeviz.pdf
    • http://files.openmindimprov.com/uploads/1/3/0/8/130814056/7fe77a2.pdf
    • https://cdn.shopify.com/s/files/1/0429/6726/9532/files/42996505523.pdf
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/fuwut.pdf
    • https://cdn.shopify.com/s/files/1/0435/7200/2974/files/kevigapirajojewemowoli.pdf
    • https://cdn.shopify.com/s/files/1/0432/5035/2296/files/autodesk_plant_3d_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/0575/2997/files/navefos.pdf
    • https://cdn.shopify.com/s/files/1/0435/3956/2645/files/set_up_a_webserver.pdf
    • https://cdn.shopify.com/s/files/1/0449/4550/6459/files/ceh_certified_ethical_hacker_all_in_one.pdf
    • https://cdn.shopify.com/s/files/1/0439/0522/0763/files/redezagodejuvopog.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/69511611873.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugogesobiwem.pdf
    • https://cdn.shopify.com/s/files/1/0433/4691/9579/files/structure_of_inorganic_compounds.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e2e.bin
73f45a731b6088444404e1fb8a4ea6ca5da33c6db10ac1358ea9027ef0ded66f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2E 4928 bytes
font_01_sfnt_off00006f0f.bin
d4a8db018a05ef2e2ebcce328af42f7bb72c7f3fd47d7b93f8c92d075ad73cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0F 10096 bytes

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